Dual modality sensor using liposome-based signal amplification technique for ultrasensitive norovirus detection

Area of Science:

• Nanomaterials Science
• Biomedical Engineering
• Analytical Chemistry

Background:

• Accurate and sensitive detection of infectious viruses is crucial for disease diagnosis and treatment.
• Existing methods may lack the required sensitivity or speed for early-stage detection.
• Development of advanced biosensing platforms is needed to address these challenges.

Purpose of the Study:

• To develop a dual-modality sensing platform for ultrasensitive virus detection.
• To utilize V2O5 nanoparticles-encapsulated liposomes (VONP-LPs) for enhanced sensing capabilities.
• To validate the platform's efficacy in detecting norovirus in clinical samples.

Main Methods:

• Fabrication of V2O5 nanoparticles-encapsulated liposomes (VONP-LPs).
• Conjugation of VONP-LPs with target-specific antibodies and magnetic nanoparticles (MNPs) for virus capture.
• Magnetic separation for virus enrichment.
• Hydrolysis of liposomes to release V2O5 nanoparticles.
• Dual-modality detection using colorimetric and electrochemical signals.

Main Results:

• The sensing platform demonstrated ultrasensitive detection of norovirus-like particles (NoV-LPs) with a wide linear range and low detection limit via electrochemical signals.
• Released V2O5 nanoparticles acted as effective peroxidase mimics and electrochemical redox indicators, generating distinct dual signals.
• The method achieved excellent accuracy in identifying norovirus (NoV) in actual clinical samples.

Conclusions:

• The proposed VONP-LP based dual-modality sensor offers a promising approach for ultrasensitive and accurate virus detection.
• This platform has the potential for early-stage diagnosis of viral diseases and public health surveillance.
• The integration of colorimetric and electrochemical signals enhances the reliability and sensitivity of the bioassay.